| OCR Text |
Show 3. Upon collection of a sample, analysis is immediately conducted. Sample analysis is carried out via 2 gas chroma-tographs (GCs) coupled with a connecting manifold. An analysis is conducted using this technique for specie identification ranging from the 10% concentration level (reactant gas levels) down to the ppm range (intermediate compounds). Experimental conditions previously discussed necessitate the single analysis of collected samples. This analytical strategy was preferred over multiple analysis for selected compounds to minimize the error associated with reestablishing previous flame conditions and probe locations. For the data reported in this paper, a flame was continuously stabilized and probed over an 18 hour period. Two Varian Vista 6000 GCs coupled to a Varian Vista 402 Data Analyzer were used in this study. Table 1 provides the GC configurations used in the study. Note Instrument 1 is equipped with an FID and TCD while Instrument 2 utilizes a TCD only. Using these GC configurations, the compounds shown in Table 2 were either quantified or identified at each location that a sample was gathered. Also note that HC1, CI and H90 were not identified using the analytical techniques of this study. In addition to the "hot" samples which were analyzed, a number of calibration samples were intermittantly analyzed throughout the compilation of the CH9C19 data. These calibration mixtures included a number of compounds in high, intermediate and low concentrations. Temperature Profiles. The temperature profile shown in this paper was obtained with Pt/10% Rh vs Pt thermocouple. Positioning of these transducers was possible to within ±0.05 mm using a precision cathetometer. Detailed discussions of the techniques used [6, 9] and the reliability of the transducers [9] has been provided elsewhere. |
